Process for manufacturing optical element

Details Process for manufacturing optical element Process for manufacturing optical element

1990-12-04

1992-11-03

Woodard, Joye L.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65111, 65274, 65900, C03B 2300

Patent

active

051603624

ABSTRACT:
In a process for manufacturing an optical element, in which a molding material is put in molds and is heated and press-molded to manufacture an optical element, a preheating treatment of the molding material is performed before it is put in the molds at a reduced pressure and a temperature lower than a temperature during the press molding.

REFERENCES:
patent: 3868170 (1975-02-01), DeLuca
patent: 4098596 (1978-07-01), Wu
patent: 4388097 (1983-06-01), Turk
patent: 4734118 (1988-03-01), Marechal
patent: 4756737 (1988-07-01), Yoshimura et al.
patent: 4913718 (1990-04-01), Yoshimura
patent: 4921519 (1990-05-01), Schinker
patent: 4946490 (1990-07-01), Hall

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